We don't have the same level of funding but could start a pot with $10-$100 and

We don't have the same level of funding but could start a pot with $10-$100 and

let people contribute to specific bounties through paypal.

let people contribute to specific bounties through paypal.

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−

It would be helpful to list $ amounts which have been donated for each bounty, even if the foundation hasn't decided how much extra (if any) to allocate. --Tesseract

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=== OggVorbis 5.1 ===

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5.1 Sound encoding in Ogg Vorbis.

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There are two steps here. Simple coupling and lowpass for the .1 channel, and a full set of tuned modes.

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They should be separate bounties.

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:This should be implemented with ambisonics as the internally coupled channels, and then use ambisonic g-format filters for en/dec coding from and to 5.1. This will allow correct playback on many different speaker layouts and an easy path to headphone support.

=== Xiph Quicktime Plugin ===

=== Xiph Quicktime Plugin ===

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(See here for more info on this project: [http://wiki.xiph.org/index.php/OggComponent/VorbisComponent])

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[http://www.xiph.org/quicktime/ QuickTime Components] is now a project hosted on xiph.org.

You have to write a Quicktime Plugin for the Ogg container and the Xiph Codec Family.

You have to write a Quicktime Plugin for the Ogg container and the Xiph Codec Family.

<p>libvorbis has a lot of room for improvement in all quality/bitrate departments, particularly at the lower quality levels / bitrates. There are many directions to approach this problem from.</p>

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libvorbis has a lot of room for improvement in all quality/bitrate departments, particularly at the lower quality levels / bitrates. There are many directions from which to approach this problem.

+

To claim this bounty, the following criteria would have to be met:

To claim this bounty, the following criteria would have to be met:

* A 25%-or-better reduction in bitrate for quality levels -1, 0, 1 on a reasonable testsuite while maintaining qualitative equivilence (or improvement) in community testing.

* A 25%-or-better reduction in bitrate for quality levels -1, 0, 1 on a reasonable testsuite while maintaining qualitative equivilence (or improvement) in community testing.

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Line 35:

* Changes under suitable license for re-integration with Xiph.Org libvorbis

* Changes under suitable license for re-integration with Xiph.Org libvorbis

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Proposed bounty: 200€

=== iPod playback support ===

=== iPod playback support ===

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Line 41:

for useful playback.

for useful playback.

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=== FLAC support in libfishsound ===

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Proposed bounty: 100€

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[http://annodex.net/software/libfishsound/ libfishsound] currently only supports Ogg Vorbis and Ogg Speex. It should be extended to support FLAC to complete the set of Xiph audio codecs.

=== Ogg Vorbis Bitrate Peeling ===

=== Ogg Vorbis Bitrate Peeling ===

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:Note: a bounty for this project has been posted on [https://launchpad.net/ launchpad.net]:

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:Note: a bounty for this project has been posted on [https://launchpad.net/ launchpad.net]: [https://launchpad.net/bounties/ogg-vorbis-bitrate-peeling Add bitrate peeling to the standard libvorbis encoding library].

<p>Ogg Vorbis bitrate peeling has been a topic brought up time and again to combat MP3 enthusiasts. But this feature does not actually exist, only the mere possibility abounds. This bounty is set to change that.</p>

<p>Ogg Vorbis bitrate peeling has been a topic brought up time and again to combat MP3 enthusiasts. But this feature does not actually exist, only the mere possibility abounds. This bounty is set to change that.</p>

The peeler must meet the following criteria:

The peeler must meet the following criteria:

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* Any (optionally transcoded) Vorbis stream can be losslessly re-encoded to a lower quality setting

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* Any Vorbis stream can be converted (not transcoded) to a lower quality setting

* Resulting streams would be identical or nearly identical to a stream generated by encoding the original source to the selected quality

* Resulting streams would be identical or nearly identical to a stream generated by encoding the original source to the selected quality

* Old Vorbis streams must be <em>peelable</em> already, or convertable with a utility in order to be made <em>peelable</em>

* Old Vorbis streams must be <em>peelable</em> already, or convertable with a utility in order to be made <em>peelable</em>

* If older streams are not natively <em>peelable</em>, old <em>unpeelable</em> Vorbis streams must be identifiable and discernable from <em>peelable</em> streams in such a way as to facilitate transcoding streams from the old format

* If older streams are not natively <em>peelable</em>, old <em>unpeelable</em> Vorbis streams must be identifiable and discernable from <em>peelable</em> streams in such a way as to facilitate transcoding streams from the old format

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* All work submitted must be licenced under the GPL or compatible licence (excepting circumstances where other licences conflict) ''[Note: In the GPL-alike case the contribution couldn't be re-integrated with the reference Vorbis encoder/decoder... do we need to stipulate a libvorbis-compatible license like the BSD/X11?]''

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* All work submitted must be licenced under a BSD style licence (excepting circumstances where other licences may conflict)

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Proposed bounty: 100€

Revision as of 08:05, 13 September 2011

These are proposed bounty projects, similar to http://gnome.org/bounties/
or the Ghostscript bug bounty program.
We don't have the same level of funding but could start a pot with $10-$100 and
let people contribute to specific bounties through paypal.

Xiph Quicktime Plugin

You have to write a Quicktime Plugin for the Ogg container and the Xiph Codec Family.
qtcomponents provides support for Ogg Vorbis and MNG. This could be used as start.
Xiph Quicktime Plugin has to support encoding/decoding for:

Ogg Media container

qtcomponentshas an operational pluggable API for import, it needs some work to be long term supportable. It does not have a pluggable API for exporting at this time.

Support for Chained Ogg Streams

qtcomponentsimports chained files as multiple tracks in QuickTime. It does not create chained files during export.

Support for Icecast Streams (sending is optional)

qtcomponentsimplements nothing towards this item. First up is a reverse-engineering effort, as the specifications for a streaming media handler have not been published.

Ogg Vorbis Bitrate Peeling

Ogg Vorbis bitrate peeling has been a topic brought up time and again to combat MP3 enthusiasts. But this feature does not actually exist, only the mere possibility abounds. This bounty is set to change that.

The peeler must meet the following criteria:

Any Vorbis stream can be converted (not transcoded) to a lower quality setting

Resulting streams would be identical or nearly identical to a stream generated by encoding the original source to the selected quality

This process is reasonably fast (that is, signifigantly faster than re-encoding from source)

The following must also be accomplished to claim this bounty:

The encoding libraries must be updated to create peelable Vorbis streams natively

Old Vorbis streams must be peelable already, or convertable with a utility in order to be made peelable

If older streams are not natively peelable, old unpeelable Vorbis streams must be identifiable and discernable from peelable streams in such a way as to facilitate transcoding streams from the old format

All work submitted must be licenced under a BSD style licence (excepting circumstances where other licences may conflict)